The ISIS protocol dissector in Ethereal 0.9.5 and earlier versions
is susceptible to a buffer overflow.

DETAIL

It may be possible to make Ethereal crash or hang by injecting a
purposefully malformed packet onto the wire, or by convincing someone
to read a malformed packet trace file. It may be possible to make
Ethereal run arbitrary code by exploiting the buffer and pointer problems=
=2E